全文获取类型
收费全文 | 665篇 |
免费 | 38篇 |
国内免费 | 16篇 |
出版年
2022年 | 5篇 |
2021年 | 5篇 |
2020年 | 2篇 |
2019年 | 10篇 |
2018年 | 7篇 |
2017年 | 12篇 |
2016年 | 13篇 |
2015年 | 5篇 |
2014年 | 60篇 |
2013年 | 62篇 |
2012年 | 58篇 |
2011年 | 69篇 |
2010年 | 73篇 |
2009年 | 45篇 |
2008年 | 37篇 |
2007年 | 46篇 |
2006年 | 32篇 |
2005年 | 34篇 |
2004年 | 38篇 |
2003年 | 25篇 |
2002年 | 24篇 |
2001年 | 27篇 |
2000年 | 6篇 |
1999年 | 5篇 |
1998年 | 5篇 |
1996年 | 3篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1992年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
排序方式: 共有719条查询结果,搜索用时 46 毫秒
671.
异源图像匹配是图像处理领域尚未解决的问题。其中,合成孔径雷达图像与光学图像差异较大,用现有方法匹配通常难以得到满意结果。针对这个问题,提出一种基于Gabor编码的异源图像匹配方法:选取一组Gabor滤波器,分别对大图和小图进行Gabor卷积;采用池化方法对卷积结果进行压缩表示;对池化结果二值化并转换为二进制表示得到Gabor二进制编码特征;采用二进制位操作计算实时图与基准图对应窗口特征的相似性,相似性最大值对应图像匹配结果。本方法采用二进制对图像进行描述,减少了计算量,同时也更好地描述了异源图像间的共性特征。实验结果表明,本方法具有较高的匹配概率,计算时间少于现有方法。 相似文献
672.
Jean-Paul Azam 《Defence and Peace Economics》2013,24(6):687-705
AbstractThis paper addresses the waves of mass killings recently perpetrated by individuals with a weak or nonexistent ideological motivation, whose acts either appear to contradict their purported political cause or are admittedly driven by a quest for notoriety. Examples range from killers who have been waging jihad against European Jews to unattached mass killers such as the Germanwings pilot to the perpetrators of mass school shootings in America and worldwide. We argue that these phenomena can be understood as instances of the Herostratos syndrome, which has been known for thousands of years as characterizing the behavior of people who seek to survive in the collective memory by excelling in their infamous acts. We provide a model of hybrid killers which accommodates the Herostratic motive alongside a political motive and characterize a well-behaved Nash equilibrium where Herostratic killers are competing with one another with a view to make a name for themselves in infamy. The policy implications point towards reducing the publicity the killers enjoy, thus frustrating their quest for notoriety. 相似文献
673.
674.
Sarah Bidgood 《The Nonproliferation Review》2013,20(3-4):329-340
ABSTRACTDespite living in a nuclear-weapon state, young Americans are generally ill-informed about weapons of mass destruction (WMD) and their means of control. The result is both widespread apathy toward nonproliferation and disarmament decision making among the general public and a looming personnel crisis within government sectors that enact policy in these domains. Considering that 67 percent of high school graduates in the United States go on to pursue a bachelor’s degree, exposing more undergraduates to nonproliferation and disarmament issues could contribute to addressing both of these challenges. The present study analyzes how these issues are already being taught at select US colleges and universities and explores ways to introduce them to more students that align with current priorities in higher education, such as interdisciplinary learning, digital humanities, and data-science learning. It also proposes concrete steps that the WMD policy community can take to help institutions of higher education integrate these topics more broadly into their curricula. The anticipated result is greater support for education in this important issue area across different stakeholders in academia, as well as increased engagement with these critical issues among a more diverse population of young people. 相似文献
675.
The Biological Weapons Convention (BWC) regime currently suffers from a lack of effective compliance procedures. Because a legally binding compliance protocol to the BWC is not available, other measures are needed to stabilize the regime against the risk of violations of its rules. The Treaty on the Non-Proliferation of Nuclear Weapons, the Chemical Weapons Convention, and the experiences of UN inspection teams show that among the necessary components of effective compliance mechanisms are an intermediary level between bilateral consultations of states parties and involvement of the UN Security Council as well as independent assessment capabilities. This article suggests that the UN Secretary General could assume such an intermediary function and, using the authority contained in Article 99 of the UN Charter, could investigate not only alleged use of biological weapons but also alleged breaches of the BWC. A standing expert unit in the Department for Disarmament Affairs could provide the independent expertise necessary for such investigations. Such a compliance mechanism could provisionally help stabilize the BWC regime until a permanent compliance system can be agreed. 相似文献
676.
677.
当前我国社会消防安全教育主要存在观念较为陈旧、机制不够完善、内容不够全面、方法缺乏创新、教育力量薄弱等突出问题。在分析影响我国社会消防安全教育效果诸因素的基础上,提出树立科学观念、充实教育内容、探索方法手段创新、完善教育机制、健全教育队伍的对策,以逐步提升社会消防安全教育水平。 相似文献
678.
张敏 《武警工程学院学报》2014,(1):93-95
为实现中国梦和强军梦,全军和武警部队正在掀起进一步推动部队训练向实战靠拢、院校教育向部队靠拢的热潮。对于武警院校来讲,就是要紧紧扭住“能打仗、打胜仗”这个强军之要,通过提高认识、创新指导理念、健全机制,切实推动院校向部队靠拢。 相似文献
679.
李遵会 《武警工程学院学报》2014,(3):1-3
强军目标对培养高素质军事人才提出了新的更高要求。培养高素质“合训”学员必须坚持把夯实思想政治素质作为学员素质的根本,把打牢科学文化素质作为学员素质的基础,把练就过硬军事素质作为学员素质的核心,把强化指挥管理素质作为学员素质的关键,全面提升“合训”学员的综合素质。 相似文献
680.
邱培成 《武警工程学院学报》2014,(5):48-50
思想政治教育是保证军队“打得赢、不变质”的有效途径。探讨制约思想政治教育效果的因素,对于增强我军的文化软实力有着现实性和必要性。从传播效果的“劝服论”入手,通过对教育者、受教育者和教育技巧三个方面的分析,探寻提升思想政治教育效果的有效途径。 相似文献